California Stormwater Intelligence

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Waterbody profile

Official Water Board record · 2026 cycle

Mint Canyon Creek Reach 1 (Confl to Rowler Cyn)

Waterbody ID (WBID): CAR4035100019990203103930
County / counties: Los Angeles
Regional Water Board: Regional Board 4 - Los Angeles Region
Waterbody type: River & Stream
Condition category: Category 4a — TMDL completed
Integrated Report cycle: 2026

303(d) listings (1)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
Nitrate and NitriteNutrients	68061	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Santa Clara River Nitrogen (32)	—

Source & provenance

Agency: California State Water Resources Control Board
Report: Final 2026 California Integrated Report
Dataset: Appendix A — 2026 303(d) List of Impaired Waters
Imported: Sep 16, 2026, 10:57 PM UTC
Waterbody ID: CAR4035100019990203103930
CALWNUM: 4403.510000, 4403.530000
WBD code: 180701020106, 180701020107
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed: —
Assessed size: 8.34 Miles

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived

Amazon com Services LLC HLA2

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Blue Cross Laboratories

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Bocchi Laboratories Inc

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

BROCK EXPRESS INC

Santa Clarita · Notice of Intent · 0.18 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

CERTIFIED THERMOPLASTICS CO LLC

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Creative Graphic Services

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Holliday Rock Santa Clarita Plant 7

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Hydra Electric Company

Burbank · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Marathon Industries Inc.

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

National Ready Mixed Concrete

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

National Technical Systems

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Saugus Union School District

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Canyon Country · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Soledad Rock Quarry

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sulphur Springs School Dist

Canyon Country · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Palmdale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

William S Hart Union High School District

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.